Valve



FIG. 1 is a perspective view depicting the valve of the present invention;

FIG. 2 is an elevational view of one side thereof, all sides appearing the same;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

The appearance of the spaces between the upper ribs and the interior portions not shown in the drawings form no part of the claimed design. 

The ornamental design for a valve, as shown and described. 